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Finding the Fourth Proportional to 1,274.88, 1,911.96 and 350.21

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Solution

The fourth proportional to 1,274.88, 1,911.96 and 350.21 is: 525.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,274.88 : 1,911.96 = 350.21 : x
  2. Step 2: Convert to fraction form
    1,274.88/1,911.96 = 350.21/x
  3. Step 3: Cross multiply
    1,274.88x = 1,911.96 × 350.21
  4. Step 4: Simplify right side
    1,274.88x = 669,592.29
  5. Step 5: Solve for x
    x = 669,592.29/1,274.88
  6. Step 6: Final answer
    x = 525.22

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.